
\begingroup
\centering
\begin{tabular}{lcccc}
   \toprule
                                & (1)     & (2)           & (3)     & (4)\\  
   $\textbf{Nitrogen (unfiltered)}$\\
   IHS restored wetland (acres) & 0.003   & -0.022$^{**}$ & 0.006   & -0.0003\\   
                                & (0.010) & (0.010)       & (0.012) & (0.012)\\   
    \\
   Dependent variable mean      & 1.8936  & 1.9391        & 2.7081  & 2.7433\\  
   Observations                 & 168,982 & 139,768       & 14,107  & 13,350\\  
   Adjusted R$^2$               & 0.42107 & 0.45611       & 0.58731 & 0.59674\\  
\end{tabular}
\par\endgroup


